As to the bearing, of the following, w

As to the bearing, of the following, which statement is not true?（）

• Aff overheat is found, the engine must be stopped for inspection
• BMuch heat of the crankcase door indicates that the bearing is overheated
• CIf bearing clearance is too large, knocking will be heard in the crankcase
• DIf bearing clearance is too large or too small, the white metal may be melted